A lithium battery tab metal strip treatment solution and tab treatment process

A processing technology and metal strip technology, applied in the direction of metal material coating process, battery pack components, circuits, etc., can solve problems such as large environmental pollution and metal strip corrosion, and achieve the effect of less environmental pollution and improved bonding effect.

Active Publication Date: 2018-09-25
GREAT POWER BATTRY ZHUHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cleaning process of the above patents all first adopts the alkali cleaning step to remove the stains on the tab metal strip to ensure the bonding effect of the tab glue and the metal strip. The strong alkalinity of the oxide will have adverse effects such as corrosion on the metal strip, and the waste lye will pollute the environment more

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Compounding nonylphenol polyoxyethylene ether, propylene glycol, triethanolamine and dimethyl diallyl ammonium chloride-acrylamide copolymer to obtain a neutral treatment solution, in which nonylphenol polyoxyethylene ether The molar concentration of propylene glycol is 0.005mol / L, the molar concentration of propylene glycol is 0.001mol / L, the molar concentration of triethanolamine is 0.004mol / L, and the molar concentration of dimethyl diallyl ammonium chloride-acrylamide copolymer is 0.01 mol / L;

[0033] Use the prepared neutral treatment solution to clean and decontaminate the tab metal strip, the cleaning temperature is 60°C, and the cleaning time is 100s;

[0034] Wash the tab metal belt after neutral decontamination, the washing temperature is 35°C, and the washing time is 180s;

[0035] Cr(NO 3 ) 3 、K 2 Cr 2 o 7 , NaF compound to obtain passivation treatment solution, Cr(NO 3 ) 3 The molar concentration is 0.02mol / L, K 2 Cr 2 o 7 The molar concentration...

Embodiment 2

[0042] The difference between this embodiment and Embodiment 1 lies in the formula of the neutral treatment liquid and the temperature and time of the neutral decontamination. The neutral treatment liquid of this embodiment is compounded with dodecylphenol polyoxyethylene ether, ethylene glycol, diethanolamine and polydimethyldiallyl ammonium chloride, wherein dodecylphenol polyoxyethylene ether The molar concentration of ethylene glycol is 0.005mol / L, the molar concentration of ethylene glycol is 0.001mol / L, the molar concentration of diethanolamine is 0.004mol / L, and the molar concentration of polydimethyldiallylammonium chloride is 0.008mol / L L; The temperature for neutral decontamination with neutral treatment liquid is 56°C, and the cleaning time is 120s. All the other steps are the same as in Example 1.

Embodiment 3

[0044] The difference between this example and Example 1 is that the neutral treatment liquid is obtained by compounding nonylphenol polyoxyethylene ether, ethylene glycol, triethanolamine and dimethyl diallyl ammonium chloride-acrylamide copolymer Neutral treatment solution, the molar concentration of nonylphenol polyoxyethylene ether in the neutral treatment solution is 0.005mol / L, the molar concentration of ethylene glycol is 0.001mol / L, and the molar concentration of diethanolamine is 0.004mol / L, The molar concentration of the dimethyl diallyl ammonium chloride-acrylamide copolymer is 0.01 mol / L. The temperature for neutral decontamination is 60°C, and the cleaning time is 100s.

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PUM

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Abstract

A lithium battery tab metal strip treatment solution and tab treatment process, the treatment solution is obtained from the compounding of alkylphenol polyoxyethylene ether, glycol, alcohol amine and polyquaternary ammonium salt, the alkyl group in the treatment solution The molar concentration of phenol polyoxyethylene ether is 0.001~0.01mol / L, the molar concentration of diol is 0.0005~0.005mol / L, the molar concentration of alcohol amine is 0.001~0.01mol / L, the molar concentration of polyquaternium 0.005-0.05mol / L. The invention can effectively remove impurities on the surface of the tab metal strip without corroding the tab of the metal strip, can improve the bonding effect of the tab glue and the metal strip, and improve the electrolyte resistance and penetration resistance of the tab.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a treatment liquid for metal strips used for tabs of lithium batteries and a tab treatment process. Background technique [0002] As one of the core components of lithium-ion batteries, the performance of the tab is very important, and the treatment of the tab metal strip has a key impact on the performance of the tab. In the tab production process, it is generally necessary to clean and passivate the tab metal strip. If the metal strip is not properly treated, it will cause the metal strip to turn yellow, have stains, be oxidized, corroded, etc., making the tab glue and the metal Poor bonding performance of the tape will affect the overall performance of the battery and even bring safety hazards. [0003] At present, the tab metal strips are mainly treated by acid pickling after alkali washing. The Chinese invention patent application with the applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G5/032C23C22/37H01M2/26H01M50/531
CPCC23C22/37C23G5/032H01M50/531Y02E60/10
Inventor 许汉良毛继勇张帆
Owner GREAT POWER BATTRY ZHUHAI
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